Dei 2101 amp

[mike49504]

This amp has a blown power supply . The fets they are using are NDP508AEL.

Is there a good cross for theese??

They are using 100 ohm gate resistors.

 

[Perry Babin]

It's strange to see 80v FETs in the supply. Are they the original parts?

If the amp uses a typical drive circuit, the IRFZ44 should be a good sub.

 

[mike49504]

Thet appear to be orginal. I put the irfz44's in. Not sure whats up with it now but the amp is drawing around 20 amps of current at idle

 

[Perry Babin]

Have you checked the driver transistors?

Can you post a photo of the power supply area of the board?

 

[mike49504]

Heres some pics of the board.

 

[Perry Babin]

Have you checked the driver transistors?

Is that a bad capacitor near the power supply board?

While it's drawing excess current, what is the DC voltage across the emitter/source resistors?

 

[mike49504]

The driver transistors are shorted in this amp.

They are marked 2L is there a goog sub for theese??

 

[Perry Babin]

The 2L is a high voltage transistor. If this is for the power supply, the MMBTA56 will be a good sub. If this is for the audio section, you'll likely have to use the exact replacement (MMBT5401).

 

[mike49504]

I have the following transistors on hand.

1A
2A
2T
2X

will any of thoose work cant remember what they are?

if not whats the mmbta56 markings?

 

[Perry Babin]

Use the 2T.

The SMD Code Book

 

[mike49504]

Thought i had some left guess not.

Will either the 1D or 2D's work?

 

[Perry Babin]

2D.